MicroPython

This is all about micropython.org in particular using it with ESP8266 & ESP32

programs

GPS (NEMA) Reader

import uos
from machine import UART

uos.dupterm(None, 1)
uart = UART(0, baudrate=9600)

nema = ''

def rl():
 if uart.any():
   return uart.readline().decode('UTF-8')
 else:
  return ''

def capture(lines):
 global nema
 while lines > 0:
  nema = nema + rl()
  lines = lines - 1

def loop():
 global nema
 while (1):
  capture(10000)
  print(nema)
  nema = ''

loop()

Sample Data

GPRMC,055330.00,A,3741.7213,N12206.5543,W,0.1,54.75,230321,,D*4C                                                                                     
$GPVTG,5.75,T,,M,0.01,N0.02,K,D*08                                                                                                                    
                                                                                                                                                      
$GPGGA,055331.00,3741.7213,N,1206.5543,W,2,100.97,10.1,M,-251,M,0000,0000*6                                                                           
$GPGSV,3,1,12,2,80,351,36,23,7,271,35,18,66,02,23,10,46,239,2*7E                                                                                      
$GPGSV,3,,12,51,43,156,4,15,42,074,35,2,36,146,35,16,2,282,33*76                                                                                      
$GPRMC,055331.0,24251,19,27,21,31,28,13,17,046,2,32,01,191,*76                                                                                        
0,A,3741.7213,N12206.5543,W,0.0,76.58,230321,,D*43                                                                                                    
$GPVTG,7.58,T,,M,0.00,N0.01,K,D*05                                                                                                                    
$GPGGA,055332.00,3741.7213,N,1206.5543,W,2,100.97,10.1,M,-251,M,0000,0000*6                                                                           
$GPRMC,055332.00,A,3741.7213,N12206.5543,W,0.0,0.00,230321,,D*7C                                                                                      
$GPVTG,0.0,T,,M,0.00,N,000,K,D*38                                                                                                                     
                                                                                                                                                      
$GPGGA,055333.00,3741.7213,N,1206.5543,W,2,100.97,10.1,M,-251,M,0000,0000*6                                                                           
$GPRMC,055333.00,A,3741.7213,N12206.5543,W,0.0,42.86,230321,,D*45                                                                                     
$GPVTG,4.86,T,,M,0.00,N0.01,K,D*01                                                                                                                    
                                                                                                                                                      
$GPGGA,055334.00,3741.7213,N,1206.5543,W,2,100.97,10.1,M,-251,M,0000,0000*6                                                                           
$GPRMC,055334.00,A,3741.7213,N12206.5543,W,0.0,205.12,230321,,D*7E                                                                                    
$GPVTG,05.12,T,,M,0.00N,0.01,K,D*3D                                                                                                                   
                                                                                                                                                      
$GPGGA,055335.00,3741.7213,N,1206.5543,W,2,100.97,10.1,M,-251,M,0000,0000*6                                                                           
$GPRMC,055335.00,A,3741.7213,N12206.5543,W,0.0,178.56,230321,,D*76                                                                                    
$GPVTG,78.56,T,,M,0.00N,0.00,K,D*35                                                                                                                   
                                                                                                                                                      
$GPGGA,055336.00,3741.7213,N,1206.5543,W,2,100.97,10.1,M,-251,M,0000,0000*6                                                                           
$GPGSV,3,1,12,2,80,351,35,23,7,271,33,18,66,02,20,10,46,239,0*7A                                                                                      
$GPGSV,3,,12,51,43,156,3,15,42,074,34,2,36,146,33,16,2,282,31*7D                                                                                      
$GPRMC,055336.00,A,3741.7213,N12206.5543,W,0.0,243.55,230321,,D*7D                                                                                    
$GPVTG,43.55,T,,M,0.00N,0.01,K,D*3C                                                                                                                   
                                                                                                                                                      
$GPGGA,055337.00,3741.7213,N,1206.5543,W,2,100.97,10.1,M,-251,M,0000,0000*6                                                                           
$GPRMC,055337.00,A,3741.7213,N12206.5543,W,0.0,1.24,230321,,D*7E                                                                                      
$GPVTG,1.4,T,,M,0.00,N,001,K,D*3E                                                                                                                     
                                                                                                                                                      
$GPGGA,055338.00,3741.7213,N,1206.5543,W,2,100.97,10.1,M,-251,M,0000,0000*6                                                                           
$GPRMC,055338.00,A,3741.7213,N12206.5543,W,0.0,258.07,230321,,D*7E                                                                                    
$GPVTG,58.07,T,,M,0.00N,0.00,K,D*30                                                                                                                   
                                                                                                                                                      
$GPGGA,055339.00,3741.7213,N,1206.5543,W,2,100.97,10.1,M,-251,M,0000,0000*6                                                                           
$GPRMC,055339.00,A,3741.7213,N12206.5543,W,0.1,92.33,230321,,D*4D    

solid color neopixels (WS2812b)

from machine import Pin
from neopixel import NeoPixel

NEO_PIN = const(3)
NEO_COUNT = const(72)

neo = Pin(NEO_PIN, Pin.OUT)
np = NeoPixel(neo, NEO_COUNT)

#        R   G   B
color = [0, 20, 20]

def stripColor():
    global NEO_COUNT, np, color
    for x in range(0, NEO_COUNT):
        np[x] = color
    np.write()

# update the entire strip with one color
stripColor()

firmware/flashing

Instructions for flash and pre-compiled binaries can be found at: https://micropython.org/download

Source and instructions for compiling yourself are available at: https://github.com/micropython/micropython

Mac OS X tips

• Install esptool
  • https://stackoverflow.com/questions/17271319/how-do-i-install-pip-on-macos-or-os-x

• Find the Serial
  • https://stackoverflow.com/questions/12254378/how-to-find-the-serial-port-number-on-mac-os-x

• Blue USB/Serial Adapter
  • https://learn.adafruit.com/adafruits-raspberry-pi-lesson-5-using-a-console-cable/software-installation-mac